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08-15-2017 02:00 PM
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  1. gourav mopidevi's Avatar
    okay mine single sim unlocked variant.....yes, its clear....i still think its MS fault as many android and ios(which are single sim/dont have knowledge about dual) supports Volte by default unlike L950 Single sim on at&t support volte where single sim L950 bought from microsoft doesnt....anyways thanks for reply.
    09-24-2016 10:58 AM
  2. slyronit's Avatar
    Yes, no one doubts that. It is MS's fault, if they wanted they could have enabled, but they didn't.

    If you have a single SIM variant, flash the EE UK ROM, VoLTE would be enabled. I have tested this myself.
    09-24-2016 11:01 AM
  3. PGrey's Avatar
    Yes, no one doubts that. It is MS's fault, if they wanted they could have enabled, but they didn't.

    If you have a single SIM variant, flash the EE UK ROM, VoLTE would be enabled. I have tested this myself.
    I don't think this will work to solve the AT&T problem though, to be clear, they'd have to have their ROM variant, for it to work on that network.

    I think you could probably use the stock, unlocked, MS 950 (single SIM only, where VoLTE is actually implemented fully) to a market where VoLTE was supported, a carrier would provision it. I'm pretty sure I've seen someone from the UK post about this, previously, but it's not 100%, and obviously more supposition than anything.

    To be fair, AT&T won't provision anything that's not theirs(branded), except iOS devices. I went to a 6P, and I still can't get VoLTE, even though I could easily, on other carriers (although my actual coverage would suck, in our area...).
    09-24-2016 05:29 PM
  4. SBL's Avatar
    Yes, no one doubts that. It is MS's fault, if they wanted they could have enabled, but they didn't.

    If you have a single SIM variant, flash the EE UK ROM, VoLTE would be enabled. I have tested this myself.


    have u tried that with dual sim variant. will that work??
    09-25-2016 12:07 AM
  5. slyronit's Avatar
    No, because they are different phones with different RM-XXXX models numbers
    09-25-2016 12:34 AM
  6. PGrey's Avatar
    have u tried that with dual sim variant. will that work??
    Maybe, but I'd say there's a decent chance of creating a brick too. I'd suggest trying this with a phone you don't care about losing, say a 640 DS and flash the EE ROM.
    Just sayin'. If there's a mis-match because of something special in that model variant, and the ROM overwrites it, it can be potentially not possible to recover, without OEM-level tools (not s/w, but h/w AND s/w).
    09-25-2016 12:36 AM
  7. PGrey's Avatar
    Realistically, if you live somewhere that your carriers will provision for you, you'd probably be better off just finding an "International Version", single SIM, of the 950(XL), it's going to save a LOT of potential headaches.
    09-25-2016 12:38 AM
  8. slyronit's Avatar
    Certainly would brick. ROMs of different RM-XXX codes have never successfully flashed to other RM-XXX code phones
    09-25-2016 12:39 AM
  9. raghulive1's Avatar
    Nope ,will be possible with Global ROM,i did fro RM-1116 dual sim to RM -1085 EE ROM,wanna proof see below screen shot
    see at that end still its RM-1116 ,if change this value VoLTE can be easily achieve with carrier ROM with altered Apn settings
    ,wp_ss_20160926_0001.jpg
    09-26-2016 04:28 AM
  10. slyronit's Avatar
    Nope ,will be possible with Global ROM,i did fro RM-1116 dual sim to RM -1085 EE ROM,wanna proof see below screen shot,Click image for larger version. 

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    That is good stuff. Now 2 questions

    1. Does the second SIM slot work anymore?
    2. Can you see the VoLTE settings in your SIM settings?

    Send us screenshots from the Mobile & SIm section.
    09-26-2016 04:31 AM
  11. raghulive1's Avatar
    1)RM-1080 so only single sim ,if you insert second sim ,both sim are blocked ,need to flash another RM-1116
    2)not appeared i am Using JIO 4G (india) .Volte Provisions not applied as its base model is RM-1116 & it may also depend on sim 4G APn settings ,if your carrier Apns works for Volte ,SIM settings changed Reboot msg will come 4G advanced settings toggle will appear.but i didn't see anything like that.
    09-26-2016 05:11 AM
  12. SBL's Avatar
    1)RM-1080 so only single sim ,if you insert second sim ,both sim are blocked ,need to flash another RM-1116
    2)not appeared i am Using JIO 4G (india) .Volte Provisions not applied as its base model is RM-1116 & it may also depend on sim 4G APn settings ,if your carrier Apns works for Volte ,SIM settings changed Reboot msg will come 4G advanced settings toggle will appear.but i didn't see anything like that.


    So can u make volte calls using jio?
    09-26-2016 05:14 AM
  13. slyronit's Avatar
    1)RM-1080 so only single sim ,if you insert second sim ,both sim are blocked ,need to flash another RM-1116
    2)not appeared i am Using JIO 4G (india) .Volte Provisions not applied as its base model is RM-1116 & it may also depend on sim 4G APn settings ,if your carrier Apns works for Volte ,SIM settings changed Reboot msg will come 4G advanced settings toggle will appear.but i didn't see anything like that.
    Hmm, as far as I know, there's no way to change the base model number, so with this arrangement, you are worse off than before.

    So you have a Jio SIM in your phone, but the USIM settings don't appear?
    09-26-2016 05:15 AM
  14. raghulive1's Avatar
    same as normal settings,no 4G enhanced settings
    09-26-2016 05:20 AM
  15. slyronit's Avatar
    In that case, the verdict is clear, no way to get VoLTE on Dual-SIM models.
    09-26-2016 06:22 AM
  16. madhi's Avatar
    Is there any way to pressurize Microsoft to release voLTE enabled firmware in India? I do think its possible to enable it. It's just that they didn't enable it earlier.
    09-26-2016 07:12 AM
  17. SBL's Avatar
    Is there any way to pressurize Microsoft to release voLTE enabled firmware in India? I do think its possible to enable it. It's just that they didn't enable it earlier.
    Have tweeted nd mailed them.no response. Everyone do the same.
    They may listen.
    09-26-2016 07:31 AM
  18. slyronit's Avatar
    Yes, it is possible, but these are US market-centric decisions, where enabling such features wouldn't help, because the carriers won't enable it. For now, up vote all VoLTE threads on feedback hub
    09-26-2016 07:45 AM
  19. PGrey's Avatar
    Yes, it is possible, but these are US market-centric decisions, where enabling such features wouldn't help, because the carriers won't enable it. For now, up vote all VoLTE threads on feedback hub
    Yep, exactly, there are currently no (significant) US carriers that support it, except on a couple of branded phones.

    Never hurts to have a LOT of people tweeting though, I'm pretty sure this is how the DTTW got leveraged, that and up-voting the issue.
    09-26-2016 02:53 PM
  20. vinayml1997's Avatar
    Hi I asked with lumia support they answered that VoLTE is not supported in India (Lumia 950 DS) but I was using Lumia 1520 it was not supported 4G in India But US model was supported after some days i got update to 4G which was unlocked 4G in my l1520 mostly VoLTE will also unlocked in L950 in future updates please upvote in feedback hub
    09-28-2016 01:26 AM
  21. gourav mopidevi's Avatar
    Yes, no one doubts that. It is MS's fault, if they wanted they could have enabled, but they didn't.

    If you have a single SIM variant, flash the EE UK ROM, VoLTE would be enabled. I have tested this myself.
    I have single sim device uk model...i got jio sim today...just now flashed with UK EE rom..no wifi hd calling setting in sim settings page...??? same goes with some euro vodafone rom...tried at&t Rom but it fails to start flash procedure
    Last edited by gourav mopidevi; 10-02-2016 at 02:18 PM.
    10-01-2016 04:05 PM
  22. lucky4ansh's Avatar
    I got it activated too.. data works fine outdoors though on my lumia 950 XL. I get full signal in home but the internet doesn't work.
    10-11-2016 07:24 PM
  23. gourav mopidevi's Avatar
    I got it activated too.. data works fine outdoors though on my lumia 950 XL. I get full signal in home but the internet doesn't work.
    first place jio sim in android volte device...download my jio app register youre number..verify email...make a call,ttry internet....then place sim into windows you get 4g data, no call no sms means volte features
    10-13-2016 09:26 AM
  24. lucky4ansh's Avatar
    first place jio sim in android volte device...download my jio app register youre number..verify email...make a call,ttry internet....then place sim into windows you get 4g data, no call no sms means volte features
    cool..works fine indoors now.
    10-14-2016 11:19 AM
  25. gourav mopidevi's Avatar
    Originally posted by lucky4ansh
    Originally Posted by gourav mopidevi
    first place jio sim in android volte device...download my jio app register youre number..verify email...make a call,ttry internet....then place sim into windows you get 4g data, no call no sms means volte features
    cool..works fine indoors now.
    Ya..im getting 10mbps speed indoors not quite sure about outdoor
    10-18-2016 04:10 AM
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